Consider two systems in the brain which evolved at different times.

The human race as we understand it simply hadn't evolved at such an early date.

I think that the situation is evolving in the right direction, but at too slow a rate.

Both evolved in much the same way, though at different paces.

Men evolved on a variety of worlds much at the same time.

Key was trying to create a new society, which she thought would evolve through life at home.

The world needed him, but he evolved at a terrible price in loneliness.

The defense strategy they have evolved lies at the heart of their ecological role.

Town ball, a game played a century and a half ago, is a cousin of baseball, which was also evolving at that time.

The idea for the slumber party had evolved at a sales meeting.